Small rust app to (de-)compress grayscale pngs using DXT1 texture compression. Blocks of 4x4 1-byte pixels are converted into 6 bytes (2 bytes of values + 4 bytes of codes), so a fixed 37.5% compression rate applies.
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DXT1 grayscale texture compression
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Wouterdek/tinydxt
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DXT1 grayscale texture compression
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